From 3019f0864c448eeeec3c9d72d315fd3698f36bb2 Mon Sep 17 00:00:00 2001 From: Niko Storni Date: Thu, 14 May 2020 01:15:14 +0200 Subject: [PATCH] first commit --- atime/atime_linux.go | 17 ++++ go.mod | 10 +++ go.sum | 187 +++++++++++++++++++++++++++++++++++++++++++ main.go | 129 +++++++++++++++++++++++++++++ 4 files changed, 343 insertions(+) create mode 100644 atime/atime_linux.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 main.go diff --git a/atime/atime_linux.go b/atime/atime_linux.go new file mode 100644 index 0000000..f6e78e9 --- /dev/null +++ b/atime/atime_linux.go @@ -0,0 +1,17 @@ +// +build linux + +package atime + +import ( + "os" + "syscall" + "time" +) + +func timespecToTime(ts syscall.Timespec) time.Time { + return time.Unix(int64(ts.Sec), int64(ts.Nsec)) +} + +func Atime(fi os.FileInfo) time.Time { + return timespecToTime(fi.Sys().(*syscall.Stat_t).Atim) +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..fe27f51 --- /dev/null +++ b/go.mod @@ -0,0 +1,10 @@ +module reflector-cleaner + +go 1.14 + +require ( + github.com/google/gops v0.3.8 + github.com/karrick/godirwalk v1.15.6 + github.com/lbryio/lbry.go/v2 v2.5.3 + github.com/sirupsen/logrus v1.6.0 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..555667c --- /dev/null +++ b/go.sum @@ -0,0 +1,187 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/StackExchange/wmi v0.0.0-20170410192909-ea383cf3ba6e/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg= +github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII= +github.com/asaskevich/govalidator v0.0.0-20180720115003-f9ffefc3facf/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY= +github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY= +github.com/btcsuite/btcd 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"github.com/karrick/godirwalk" + "github.com/lbryio/lbry.go/v2/extras/errors" + "github.com/sirupsen/logrus" +) + +var blobsDir string + +func main() { + if err := agent.Listen(agent.Options{}); err != nil { + panic(err) + } + if len(os.Args) != 2 { + panic("you must pass 1 argument: the path of the blobs directory") + } + blobsDir = os.Args[1] + thresholdStr := os.Getenv("DISK_THRESHOLD") + threshold := 0.90 + var err error + if thresholdStr != "" { + threshold, err = strconv.ParseFloat(thresholdStr, 64) + if err != nil { + panic(err) + } + } + if _, err := os.Stat(blobsDir); os.IsNotExist(err) { + panic(errors.Err("directory doesn't exist: %s", blobsDir)) + } + used, err := getUsedSpace() + if err != nil { + logrus.Errorln(err.Error()) + return + } + logrus.Infof("disk usage: %.2f%%\n", used*100) + if used > threshold { + logrus.Infof("over %.2f%%, cleaning up", threshold*100) + err = WipeOldestBlobs() + if err != nil { + logrus.Errorln(err.Error()) + return + } + used, err := getUsedSpace() + if err != nil { + logrus.Errorln(err.Error()) + return + } + logrus.Infof("disk usage: %.2f%%\n", used*100) + logrus.Infoln("Done cleaning up") + } +} + +// GetUsedSpace returns a value between 0 and 1, with 0 being completely empty and 1 being full, for the disk that holds the provided path +func getUsedSpace() (float64, error) { + var stat syscall.Statfs_t + err := syscall.Statfs(blobsDir, &stat) + if err != nil { + return 0, err + } + // Available blocks * size per block = available space in bytes + all := stat.Blocks * uint64(stat.Bsize) + free := stat.Bfree * uint64(stat.Bsize) + used := all - free + + return float64(used) / float64(all), nil +} + +func WipeOldestBlobs() (err error) { + type datedFile struct { + Atime time.Time + FullPath string + } + datedFiles := make([]datedFile, 0, 5000) + checkedBlobs := int32(0) + err = godirwalk.Walk(blobsDir, &godirwalk.Options{ + Callback: func(osPathname string, de *godirwalk.Dirent) error { + if !de.IsDir() { + i := atomic.AddInt32(&checkedBlobs, 1) + if i%100 == 0 { + logrus.Infof("checked %d blobs", i) + } + if de.IsRegular() { + stat, err := os.Stat(osPathname) + if err != nil { + return err + } + datedFiles = append(datedFiles, datedFile{ + Atime: atime.Atime(stat), + FullPath: osPathname, + }) + } + } + return nil + }, + Unsorted: true, // (optional) set true for faster yet non-deterministic enumeration (see godoc) + }) + if err != nil { + return err + } + + sort.Slice(datedFiles, func(i, j int) bool { + return datedFiles[i].Atime.Before(datedFiles[j].Atime) + }) + //delete the first 5000 blobs + for i, df := range datedFiles { + if i >= 5000 { + break + } + if i%100 == 0 { + logrus.Infof("[%s] would delete %s", df.Atime.String(), df.FullPath) + } + //err = os.Remove(df.FullPath) + //if err != nil { + // return err + //} + } + return nil +}